The correct answer regarding the placenta is: Estrogen is secreted by placenta.
The placenta is an essential organ that forms during pregnancy, providing oxygen and nutrients to the growing fetus and removing waste products from the fetus's blood. It plays a crucial role in maintaining pregnancy and supporting fetal development.
Here’s a clarification of the options listed:
- Wharton’s jelly is not part of the placenta; it is a gelatinous substance found within the umbilical cord.
- The umbilical cord, not the placenta, contains 2 arteries and 1 vein, which facilitates the exchange of nutrients and waste between the mother and fetus.
- Estrogen is indeed one of the hormones produced by the placenta, playing a role in maintaining the pregnancy and preparing the body for labor.